Experimental investigation of the limits of ethanol combustion in the boundary layer behind an obstacle
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Experimental data on the flow structure and mass transfer near the boundaries of the region existence of the laminar and turbulent boundary layers with combustion are considered. These data include the results of in-vestigation on reacting flow stability at mixed convection, mass transfer during ethanol evaporation “on the floor” and “on the ceiling”, when the flame surface curves to form the large-scale cellular structures. It is shown with the help of the PIV equipment that when Rayleigh–Taylor instability manifests, the mushroom-like structures are formed, where the motion from the flame front to the wall and back alternates. The cellular flame exists in a narrow range of velocities from 0.55 to 0.65 m/s, and mass transfer is three times higher than its level in the standard laminar boundary layer.
Keywordsflame blow-off mixed convection combustion “on the ceiling” PIV method Rayleigh−Taylor instability mushroom-like structures
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- 1.S.I. Isaev, I.A. Kozhinov, V.I. Kofanov, and A.I. Leontiev, Theory of Heat and Mass Transfer, A.I. Leontiev (Ed.), Vysshaya Shkola, Moscow, 1979.Google Scholar
- 6.B.S. Petukhov and A.F. Polyakov, Heat Transfer at Mixed Turbulent Convection, Nauka, Moscow, 1986.Google Scholar
- 10.L. Orloff and J. De Ris, Modeling of ceiling fires, 13th Symp. (Int.) on Combustion, Comb. Inst., 1971, P. 979–990.Google Scholar
- 12.B. Lewis and G. von Elbe, Combustion, Flame, and Explosions of Gases, Academic Press, New York, 1961.Google Scholar
- 14.M. Van Dyke, An Album of Fluid Motion, The Parabolic Press, Stanford, California, 1982.Google Scholar
- 15.N.A. Inogamov, A.Yu. Demianov, and E.E. Son, Hydrodynamics of Mixing, MIPT, Moscow, 1999.Google Scholar
- 16.C.E. Wooldridge and R.J. Muzzy, Measurements in the turbulent boundary layer with porous wall injection and combustion, Tenth Symp. (Int.) on Combustion (The Combust. Inst., Pittsburgh), 1965, P. 1351–1362.Google Scholar
- 17.J.W. Jones, L.I. Isaacson, and S. Vreekes, A turbulent boundary layer with mass addition, combustion, and pressure gradients, AIAA J., 1971, Vol. 9, No. 9, P. 1762–1768.Google Scholar
- 22.M.J. Gollner, X. Huang, A.S. Rangwala, and F.A. Williams, Effects of inclination on upward flame spread, in: Fall Technical Meeting of the Western States Section of Combustion Institute, October 16-18, 2011, P. 648–657.Google Scholar
- 23.Certificate of Authorship 1270588 USSR, cl. G-01 K 17/02, Method for determining the heat flux components and device for its implementation, B.F. Boyarshinov, E.P. Volchkov, V.I. Terekhov, V.I. Titkov, Discoveries. Inventions, 1986, No. 42.Google Scholar